1/*
2 * Platform IDE driver
3 *
4 * Copyright (C) 2007 MontaVista Software
5 *
6 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
7 *
8 * This program is free software; you can redistribute  it and/or modify it
9 * under  the terms of  the GNU General  Public License as published by the
10 * Free Software Foundation;  either version 2 of the  License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/types.h>
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <linux/ide.h>
18#include <linux/ioport.h>
19#include <linux/module.h>
20#include <linux/ata_platform.h>
21#include <linux/platform_device.h>
22#include <linux/interrupt.h>
23#include <linux/io.h>
24
25static void plat_ide_setup_ports(struct ide_hw *hw, void __iomem *base,
26				 void __iomem *ctrl,
27				 struct pata_platform_info *pdata, int irq)
28{
29	unsigned long port = (unsigned long)base;
30	int i;
31
32	hw->io_ports.data_addr = port;
33
34	port += (1 << pdata->ioport_shift);
35	for (i = 1; i <= 7;
36	     i++, port += (1 << pdata->ioport_shift))
37		hw->io_ports_array[i] = port;
38
39	hw->io_ports.ctl_addr = (unsigned long)ctrl;
40
41	hw->irq = irq;
42}
43
44static const struct ide_port_info platform_ide_port_info = {
45	.host_flags		= IDE_HFLAG_NO_DMA,
46	.chipset		= ide_generic,
47};
48
49static int plat_ide_probe(struct platform_device *pdev)
50{
51	struct resource *res_base, *res_alt, *res_irq;
52	void __iomem *base, *alt_base;
53	struct pata_platform_info *pdata;
54	struct ide_host *host;
55	int ret = 0, mmio = 0;
56	struct ide_hw hw, *hws[] = { &hw };
57	struct ide_port_info d = platform_ide_port_info;
58
59	pdata = dev_get_platdata(&pdev->dev);
60
61	/* get a pointer to the register memory */
62	res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
63	res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
64
65	if (!res_base || !res_alt) {
66		res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
67		res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
68		if (!res_base || !res_alt) {
69			ret = -ENOMEM;
70			goto out;
71		}
72		mmio = 1;
73	}
74
75	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
76	if (!res_irq) {
77		ret = -EINVAL;
78		goto out;
79	}
80
81	if (mmio) {
82		base = devm_ioremap(&pdev->dev,
83			res_base->start, resource_size(res_base));
84		alt_base = devm_ioremap(&pdev->dev,
85			res_alt->start, resource_size(res_alt));
86	} else {
87		base = devm_ioport_map(&pdev->dev,
88			res_base->start, resource_size(res_base));
89		alt_base = devm_ioport_map(&pdev->dev,
90			res_alt->start, resource_size(res_alt));
91	}
92
93	memset(&hw, 0, sizeof(hw));
94	plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
95	hw.dev = &pdev->dev;
96
97	d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
98	if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE)
99		d.irq_flags |= IRQF_SHARED;
100
101	if (mmio)
102		d.host_flags |= IDE_HFLAG_MMIO;
103
104	ret = ide_host_add(&d, hws, 1, &host);
105	if (ret)
106		goto out;
107
108	platform_set_drvdata(pdev, host);
109
110	return 0;
111
112out:
113	return ret;
114}
115
116static int plat_ide_remove(struct platform_device *pdev)
117{
118	struct ide_host *host = dev_get_drvdata(&pdev->dev);
119
120	ide_host_remove(host);
121
122	return 0;
123}
124
125static struct platform_driver platform_ide_driver = {
126	.driver = {
127		.name = "pata_platform",
128		.owner = THIS_MODULE,
129	},
130	.probe = plat_ide_probe,
131	.remove = plat_ide_remove,
132};
133
134module_platform_driver(platform_ide_driver);
135
136MODULE_DESCRIPTION("Platform IDE driver");
137MODULE_LICENSE("GPL");
138MODULE_ALIAS("platform:pata_platform");
139